DIN ISO 18311:2014-09

This International Standard specifies a technique for determining the effects of anthropogenic impacts (e. g. substances) in the context of the prevailing environmental conditions on the feeding activity of soil organisms in the field. The breakdown of organic matter by soil invertebrates and micro-organisms is a crucial process that determines nutrient availability for plants and is important for the maintenance of soil fertility. In addition, decomposing plant litter provides habitats and food for a wide range of organisms supporting biodiversity and ecosystem services. This International Standard is applicable to all soils in which soil organisms are active. The sampling design of field studies in general is specified in ISO 23611-6 . For sampling of microorganisms see ISO 10381-1 and ISO 10381-6. The design can vary according to the climatic/regional conditions of the site to be investigated. This International Standard is not applicable for semi-terrestrial or very shallow soils. It can be difficult to use it under extreme climatic or geographical conditions (e. g. in high mountains).